java jstack命令详解

名称jstack: stack trace

摘要:

      jstack [ option ] pid

       jstack [ option ] executable core

       jstack [ option ] [server-id@]remote-hostname-or-IP

功能：

    jstack 打印出指定的java进程、core文件或远程调试服务的调用栈信息。包括类全面，方法名称，byte code index和代码行号。指定-m参数还可以打印出本地方法调用栈.  可以快速定位程序问题.

参数说明:

pid   process  id  for  which  the stacktrace is to be printed.  The process must be a Java process. To get a list of Java processes running on a machine, jps may be used.

executable     Java executable from which the core dump was produced.

core     core file for which the stack trace is to be printed.

remote-hostname-or-IP  remote debug server's (see jsadebugd) hostname or IP address.

 server-id      optional unique id, if multiple debug servers are running on the same remote host.

OPTION 选项:

-m 打印java和本地混合调用栈.

-h -help打印帮助信息

 

示例：

 

说明：

ltu-1是进程名称, prio优先级, tid java线程id, nid native线程id. java.lang.Thread.State:WAITING线程状态.

locked <0x00000007955b0850>已经进入临界区

waiting:线程等待被唤醒.对应的代码如下：

new Thread(new Runnable() {
    @Override
    public void run(){
       synchronized (i){
           try {
               i.wait();
           }catch (InterruptedException e){

           }
       }
    }
}, "ltu-1").start();